function getUUID() {
 return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g,function(c){
   var r=Math.random()*16|0,
   v=c=='x'?r:(r & 0x3 | 0x8);
   return v.toString(16);
 });
}
function getExt(filePath){
  var index=filePath.lastIndexOf(".");
  var ext=filePath.substr(index+1);
  return ext;
}

export {
  getUUID,
  getExt
}